[guadec-web] Flag the tax document mail content as utf8

[Rui Matos <rtcm src gnome org>]

commit f71d87d01a6c8b1aa2e8db24119a5d64533a8aaf
Author: Rui Matos <tiagomatos gmail com>
Date:   Thu Jun 27 22:21:02 2013 +0200

    Flag the tax document mail content as utf8

 wordcamp-base/template-registration.php |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/wordcamp-base/template-registration.php b/wordcamp-base/template-registration.php
index 749cc44..08684b6 100644
--- a/wordcamp-base/template-registration.php
+++ b/wordcamp-base/template-registration.php
@@ -651,6 +651,11 @@ function send_registration_email($reg)
   remove_filter('wp_mail_content_type', 'set_html_content_type');
 }
 
+function set_plain_utf8_content_type()
+{
+  return 'text/plain; charset=UTF-8';
+}
+
 function send_tax_document($reg)
 {
   global $current_user;
@@ -659,7 +664,9 @@ function send_tax_document($reg)
     return;
   }
 
+  add_filter('wp_mail_content_type', 'set_plain_utf8_content_type');
   wp_mail($current_user->user_email, '[GUADEC 2013] Registration tax document', $reg->tax_document);
+  remove_filter('wp_mail_content_type', 'set_plain_utf8_content_type');
 }